Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu lang » chieu sang, hieu quang, nhieu tang
dang hanh » dang thanh, ban hanh, dang van
hoa dong » hoat dong, ha dong, hoa cong
cua dong » chua dong, cua cong, cua dang
hanh ban » thanh ban, hang ban, hanh san
ban cau » bang cau, ban can, van cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sach) or (hieu lang)) - canh tranh ((hoa dong) or (cua dong)) dang hanh ban cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (hieu lang)) - canh tranh ((hoa dong) OR (cua dong)) dang hanh ban cau.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (hieu lang)) - canh tranh ((hoa dong) or (cua dong)) dang hanh ban cau*.